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Summary: Semantics and Verification of Software
Lecture 21: Dataflow Analysis IV
(Solving Dataflow Equation Systems)
Thomas Noll
Lehrstuhl f¨ur Informatik 2
(Software Modeling and Verification)
RWTH Aachen University
noll@cs.rwth-aachen.de
http://www-i2.informatik.rwth-aachen.de/i2/svsw10/
Summer Semester 2010
Outline
1 Repetition: The Dataflow Analysis Framework
2 Solving Dataflow Equation Systems
3 Uniqueness of Solutions
4 Efficient Fixpoint Computation
Semantics and Verification of Software Summer Semester 2010 2
Dataflow Systems I
Definition (Dataflow system)
A dataflow system S = (L, E, F, (D, ), , ) consists of
a finite set of (program) labels L (here: Lc),
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